Lens mounting



May 1, 1923. 1,453,814

J. R. VAN TASSEL LENS MOUNTING Filed Jan. 4, 1922 Patented May 1, 1923. v

,J'O HN B. VAN TASSEL, OF GENEVA, NEW YORK, ASSIGNOR'TO THE SFIANDARD OPTICAL COMPANY, OI GENEVA, NEW YORK, A CORPORATION OF NEW YORK.

LENS MOUNTING.

Application filed January 4, 1922. Serial No. 526,986.

To all whom it may concern:

Be it known that I, J OHN R. VAN Tassnn, of Geneva, in the county of Ontario, in the State of New York, have invented new and useful Improvements in Lens Mountings, of which the following, taken in connection with the accompanying drawings, is

a full, clear, and exact description.

This invention relates to a lens mounting to be used with rim or rimless lenses an refers more particularly to the construction of the nose-piece and its means of attachment to the rims or other lens-holders. These nose-pieces usually consist of bowshaped strips of metal having their ends bent at an angle to the main body for convenience of fitting the bow to the nose and are attached by various fastening means to the lens-holders and in most instances, the

intermediate portion of the bow, which engages with the bridge of the nose, is slightly flattened to afford a broader surface of contact and, therefore, less imbedding effect with the nose but even under those conditions, the weight of the lenses and frame is sufiicient to cause more or less irritation of the skin and flesh.

, One of the objects of this invention is to provide the arch of the bow with a non-metallic sleeve of celluloid or equivalent more nose without irritation and at the same time to permit the metallic part of the bow to be made of uniform cross-sectional area and contour so that the non-metallic sleeve may be made as a separate article of manufacture and slip ed over and upon the metallic part, while the latter is 1n a straightened condition, thereby reducing the cost and greatly facilitatin the manufacture of lens-mountin s of t is type.

Another 0%ject is to provide telescopic connections between the ends of the nosepiece and lens-holders, whereby those parts may be easily and quickly connected and the telescopic parts bent to the desired angle to facilitate the adjustment of the bow to the nose and also to serve as the means for holding the telescoping parts against relative endwise or turning movement one upon the other.

as Other objects and uses relating to specific arts of the mounting will be brought out in the following description.

In the drawings:

Figure 1 is a top plan of a rimmed lensmountmg embodying the various features of my invention.

Figure 2 is an enlar ed top plan partly in section and partly roken away of the same mounting.

Figure 3 is a face view of the tubular metallic nose-piece with the non-metallic sleeve thereon berore bending.

Figure 4 is a face view of parts of a mounting showing a rimless lens-holder with a strai ht tang before bending together with t e non-metallic sleeve and a portion of the tubular metallic nose-piece.

Flgure 5 is an enlarged transverse sectional view through the nose-piece taken on line 55, Figure 2. j

As illustrated, this mountingmay consist of a pair of lens-holding rims -1 as shown in Figures 1 and 2 or rimless lensholders as -1', one of which is shown in Figure at, each lens-holder being provided with a tang -2.- rigidly united at one end thereto by spot welding or other suitable fastening means, said mounting also comprising a tubular metallic nose-piece -3 and a non-metallic'sleeve i of celluloid or equivalent resilient material.

The tangs --2-, metallic nose-piece -3- and non-metallic sleeve 4.- are preferably oval or slightly flattened in cross-section to prevent their turning one upon the other when assembled, the tubular member -3-- being preferably of uniform cross-sectional area; from end to end, while the sleeve -4 is slightly wider at the center and tapers toward both ends particularly along its greater .diameter so as to form a relatively wider contact surface for the bridge of the nose to reduce liability of irritation thereof.

The parts -2, 3- and 4 are assembled one upon the other telescopically while they are in a straightened condition or rather before bending to the required;

form so that after bending, they will be held Y against relative longitudinal movement by the bends and against turning movement by the oval formation thereof.

That is, after the metallic tube -3- and sleeve -4- have been brought to the required cross-sectional form and len and while still in a straightened condition, the

Elm

sleeve 4--- is slipped endwise over and upon the tube --3 from one end to approximately the center thereof after which the intermediate portions of bothof the assembled parts are bent transversely of their short axes into the form of a bow as shown in Figures 1 and 2, whereupon the tangs of the lens-holders -1 or --1-- may be inserted telesco ically into the sockets in opposite ends 0 the tube -3 and afterwards bent to the required an Is to bring the lensholders into substantia y the same plane, thereby establishing a positive lock between the tangs and adjacent ends of the metallic tube to hold the parts against relative endwise movement, while at the same time, the oval form of the tangs and adjacent ends of the tube 3 serve to hold the parts against relative turning movement, it being understood in practice that the tangs are of sufiicient length to extend some distance beyond the angles as -aformed'by the last named bending operation and that the tubes preferably abut against the lens-holders -1 or- 1- as the case may be.

The tangs are of substantially the same cross-sectional area throughout 'the greater ortions of their lengths except that their ree ends are slightly tapered to permit them to enter more easily into the sockets in the adjacent ends of the tube, the cross-sectional area of the tangs-being substantially equal to that of the sockets or opening through the tube .to establish a close fit therein.

In like manner, the central opening through the sleeve 4 is of substantially the same cross-sectional area and form as that of the exterior of the tube -3 to cause those parts to fit snugly one upon the other when assembled, it being understood that b making the sleeve 4 of celluloid or equiva ent material, it may be readily bent to the desired contour together with the bowed portion of the tube.

meaem 4 If desired, the sleeve may be additionally held against endwise movement by crimping its ends into circumferential channels -5- 1n the periphery of the adjacent portion of the tube although this provision 1s deemed unnecessary in view of the bending of the two parts to form the bow-shaped nose-piece but in either case, the ends of the sleeve and also the ends of the tube may be tapered off gradually to merge as'nearly as powble with the adjacent portion of the tube and lensholder, respectively.

What I claim is:

1. In a lens-mounting, a tubular nosepiece, and lens-holders havin tangs inserted telescopically in the ends of the nose piece, the to escoping parts being bent to form similar angles.

2. In a lens-mounting, a tubular nosepiece, and lens-holders having tangs inserted telescopically in the ends of the nose-piece, the telescopin parts having cooperative means for hol ing them against relative rotation one upon the other.

3. A lens-mounting comprising a tubular nose-piece, a sleeve surrounding the intermediate portion of the nose-piece, and lensholders havin tangs inserted telescopically in both ends 0 the tubular nose-piece.

4. A lens-mounting comprising a tubular nose-piece, a sleeve surrounding the intermediate portion of the nose-piece, and lensholders having tangs inserted telescopically in both ends of the tubular nose-piece, the nose-piece, sleeve, and tangs being slightly flattened transversely to prevent relative r0- tation of those parts one upon the other.

In witness whereof I have hereunto set my hand this 19th day of December, 1921.

JQHN R. VAN TASSEL.

Witnesses:

BERTHA J. DERRICK, HARRIET H. SQUIRE. 

